These are not lightfast, but as someone who mostly journals in her art journal, it's not an issue at all. These are insanely vibrant, but with a little experience, they can be diluted to lighter shades, or mixed to create new colors, bright and neutral.

These are the colors in Set A, and there are also a brown and black in the set that are not shown. I have to emphasize, the colors are not as they are in reality. The pinks are rather close, but even with some photoshop editing, I couldn't get the turquoise ones to show properly, so please take that under consideration.

Here's an art journal spread I started using these-

These are so easy to mix, here's a color wheel I created from just 3 colors-

I show you how these look and talk about the pros and cons in the video-